Hides the footerList and actions in ImageViewer for full screen image view mode
Summary:
Refs T6268
Adds property binding on the visibility of the ImageViewer's actions and footerList
Test Plan: Testing done
Reviewers: Koko, mart
Reviewed By: Koko, mart
Maniphest Tasks: T6268
Differential Revision: https://phabricator.kde.org/D7234